Thermocline
수온약층
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<speciesfyi-glossary slug="thermocline"></speciesfyi-glossary>Definition
A layer in the ocean where temperature changes rapidly with depth, separating warm surface water from cold deep water.
Detailed Explanation
The permanent thermocline in tropical oceans acts as a barrier to vertical mixing, preventing nutrient replenishment of surface waters and creating "ocean deserts." Seasonal thermoclines break down during autumn storms in temperate seas, triggering autumn phytoplankton blooms. As oceans warm under climate change, stratification strengthens and thermoclines become shallower, reducing nutrient supply to surface waters and potentially decreasing ocean productivity.